Boston Scientific Corporation

Medrad, Inc.

Boston Scientific Medical Device Limited

Jason M Bronstad

Michael John Bonnette

Eric Joel Thor

Debra M Kozak

Jason T Anderson

David Brian Morris

Laszlo Trent Farago

Diana Dutcher

Corey Rasch

Douglas J Ball

Leif E Leirfallom

Brian D Bruckner

Lief E Leirfallom

Michael Schrom

Laszio T Farago

A catheter assembly includes a catheter body having a catheter lumen. A manifold assembly is coupled with a proximal catheter portion. A manifold lumen extends through the manifold assembly, and the manifold lumen includes an assembly cavity extending around the proximal catheter portion. A fluid jet loop is coupled with a high pressure tube at a distal catheter portion. The catheter assembly further includes a tapered loop guide surface.

Catheter having tapered guide surface

Fluid infusion systems and fluid couplings are described herein. The infusion systems may include one or more fluid couplings used to make fluidic connection between a supply line and delivery tubing. The fluid couplings separate the functions of providing a seal around a delivery tube and retaining the delivery tube within the fluid coupling. The seal provided around the delivery tube prevents leakage around an exterior surface of a delivery tube such that fluid passing through the coupling must pass through the delivery tube rather than leak around the delivery tube. The structure used to retain the delivery tube in the fluid coupling prevents ejection of the delivery tube from the coupling due to the fluid pressures present in the coupling. The separate functions are performed by different structures within the fluid couplings.

Infusion flow system and fluid coupling

Medical devices and methods for making and using medical devices are disclosed. An example catheter is disclosed. The catheter comprises a catheter body having a catheter lumen and a high pressure tube disposed within the catheter lumen. The high pressure tube has a substantially circular cross section. The catheter also includes a fluid jet loop coupled to the high pressure tube at a transition section. The transition section has a circular cross section and a non-circular cross section. The fluid jet loop includes fluid jet orifices along a tapered loop guide surface. The catheter also includes a distal guide. The intermediate guide surface of the catheter lumen flushly engages with a leading edge of the tapered loop guide surface and the distal guide is configured to guide the instrument over the intermediate guide surface, the tapered loop guide surface and through the fluid jet loop.

A catheter including a catheter body having a catheter lumen is disclosed. A manifold assembly is coupled with a proximal catheter portion. A manifold lumen extends through the manifold assembly and includes an assembly cavity extending around the proximal catheter portion. A fluid jet loop including fluid jet orfices along a tapered loop guide surface is coupled with a distal catheter portion. The catheter further includes a composite guide having a proximal guide insert and a distal guide. The proximal guide insert is positioned within the assembly cavity and includes a guide insert surface flush with a catheter body interior wall. The distal guide includes a tapered loop guide surface, and an intermediate guide surface of the catheter lumen is flushly engaged with a leading edge of the tapered loop guide surface, the distal guide continuously tapering inwardly and distally along the tapered loop guide surface.

Catheter including composite guide and methods for use of the same

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St. Francis, MN, United States of America

Jason M Bronstad